Add Storage or Caching Layer

[Curran Kelleher]

Creating the bundle currently takes about half a second, and the server re-generates the bundle every time the same combination of modules is requested. The service works, but it is slow. One way to improve this would be to somehow store bundles in a cache (e.g. Redis) or permanent storage layer (e.g. Amazon S3).

This would improve load times significantly if traffic scales. It would also pave the way for this project is to serve as a CDN for D3 custom builds.